/**
 * Copyright (c) 2021 OceanBase
 * OceanBase CE is licensed under Mulan PubL v2.
 * You can use this software according to the terms and conditions of the Mulan PubL v2.
 * You may obtain a copy of Mulan PubL v2 at:
 *          http://license.coscl.org.cn/MulanPubL-2.0
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PubL v2 for more details.
 */

#ifndef OCEANBASE_SQL_OB_LOG_SEQUENCE_H
#define OCEANBASE_SQL_OB_LOG_SEQUENCE_H
#include "sql/optimizer/ob_logical_operator.h"
#include "sql/optimizer/ob_log_set.h"
namespace oceanbase {
namespace sql {
class ObLogSequence : public ObLogicalOperator {
private:
  typedef common::ObSEArray<uint64_t, 4> SequenceIdArray;

public:
  ObLogSequence(ObLogPlan& plan) : ObLogicalOperator(plan)
  {}
  virtual ~ObLogSequence()
  {}
  virtual uint64_t hash(uint64_t seed) const override;
  virtual int copy_without_child(ObLogicalOperator*& out) override;
  virtual int print_my_plan_annotation(char* buf, int64_t& buf_len, int64_t& pos, ExplainType type) override;
  int allocate_exchange_post(AllocExchContext* ctx) override;
  const common::ObIArray<uint64_t>& get_sequence_ids() const
  {
    return nextval_seq_ids_;
  }
  common::ObIArray<uint64_t>& get_sequence_ids()
  {
    return nextval_seq_ids_;
  }
  virtual int est_cost() override;

private:
  SequenceIdArray nextval_seq_ids_;
};
}  // namespace sql
}  // namespace oceanbase
#endif  // OCEANBASE_SQL_OB_LOG_SEQUENCE_H
